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Consensus-based Distributed Particle Filters in Sensor Networks

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Consensus-based Distributed Particle Filters in Sensor Netwo...

New Approaches for Distributed Sensor Networks Consensus in the Presence of Communication Time Delay

2009中国控制与决策会议

作者： Nargess Sadeghzadeh.N ahmad afshar Department of Electrical Engineering Amirkabir University of TechnologyTehranIran

ISBN: (纸本)9781424427239

＜正＞This paper considers the problem of distributed particle filtering using consensus *** monitored environment may possess nonlinear dynamics,nonlinear measurements,and non-Gaussian process and observation *** considers the scenario in which a set of sensor nodes make multiple,noisy measurements of the monitored system.-The goal of the proposed approach is to perform an on-line,distributed estimation of the current state at multiple sensor *** this new proposed algorithm,average consensus filters are well organized to do distributed computation and information consensus in distributed particle ***,sensors’ energy consumption concerns are considered partially *** order to achieve almost full environment information,sensors are assumed to have different sensing models,but same *** a case study,the application of the proposed algorithm to state estimation of an unmanned air vehicle is considered *** results show the good efficiency of the algorithm in the nonlinear state estimation.

关键词： Sensor Networks Distributed State Estimation Consensus Algorithm Particle Filtering

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New Approaches for Distributed Sensor Networks Consensus in ...

Using p-invariants to transform inadmissible constraints into admissible constraints

2009中国控制与决策会议

作者： Nargess Sadeghzadeh.N ahmad afshar Department of Electrical Engineering Amirkabir University of TechnologyTehranIran

ISBN: (纸本)9781424427239

＜正＞This paper introduces new methods for sensor fusion in homogenous sensor networks in the presence of the communication time *** allows the sensor nodes to solve consensus problems despite the network induced *** is shown that such approaches guarantee tracking of each consensus filter output to the original value of the measured signal in both regular and non-regular network graph *** the non-regular case,there is a sufficient condition to prove the *** the networks with communication time delay,consensus problem is solved by considering time delay as a constant as well as using the idea of the variable sampling period in order for time delay *** the second case,each sensor sampling period is variable and it is taken as maximum predicted time delay of the all channels in the network at each sampling *** this way,an MLP neural network is used for time delay prediction and a majority consensus filter is introduced for approximating maximum predicted time delay in the *** results are provided that demonstrate the effectiveness of these methods for distributed sensor fusion and solving consensus problem in the presence of the time delay.

关键词： Sensor Networks Sensor Fusion Network Induced Time Delay Time Delay Prediction Multi Layer Perceptron(MLP) Neural Network Graph Laplacian.

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Using p-invariants to transform inadmissible constraints int...

眼观检测猪血清内伪狂犬病病毒抗体的斑点酶免疫试验

第26届中国控制与决策会议

作者： S.M.Saeed Damadi Ali Doustmohammdi ahmad afshar the Department of Electrical Engineering Amirkabir University of Technology (Tehran Polytechnic) Faculty of Electrical Engineering Amirkabir University of Technology (Tehran Polytechnic)

In this paper we propose a new approach that not only enforces the admissible constraints but also transforms inadmissible constraints into admissible ones. This approach is based on an efficient method that constructs new *** this method dealing with transitions is more convenience because creating new p-invariants in this way utilizes transitions to create a new p-invariant. Therefore, designers are easily able to deal with transitions including uncontrollable or unobservable transitions. Constructing p-invariants will be executed by introducing one theorem and two lemmas;besides,by taking advantages of this theorem and two lemmas a complementary lemma will be established to show when a maximal permissive controller would exist. Finally, we propose a new algorithm which uses the theorem and lemmas to transform inadmissible constraints into admissible ones. In contrast to other methods, this algorithm which we call it"transforming algorithm" can easily transform inadmissible constraints into admissible constraints without needing to solve an integer linear programming（ILP） problem. The correctness of this algorithm will be evaluated through an example, and result shows that transforming inadmissible constraints into admissible ones using this method dose not need solving an integer linear programming and requires less computation to implement a proper controller.

关键词： P-invariants Maximal permissive Petri net Supervisory control

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中国动物检疫 1987年第3期 40-42页

作者： ahmad afshar ,齐铁英

近年来,酶免疫试验(EIA)已广泛用于诊断多种动物疾炳。用EIA作伪狂犬炳的血清学诊断具有高度灵敏性,但只有设备精良的实验室才能做。此外,EIA所用的聚苯乙烯板固定抗原的效果差,而且其有效吸附量差别明显。为此,我们用硝酸纤维素纸(NC)... 详细信息

近年来,酶免疫试验(EIA)已广泛用于诊断多种动物疾炳。用EIA作伪狂犬炳的血清学诊断具有高度灵敏性,但只有设备精良的实验室才能做。此外,EIA所用的聚苯乙烯板固定抗原的效果差,而且其有效吸附量差别明显。为此,我们用硝酸纤维素纸(NC)固定伪狂犬病病毒(PRV)抗原作斑点试验,亚设计一种眼观检测猪PRV抗体的EIA试验。此外,通过检测实验和自然感染猪血清评价了斑点EIA特性。并将本试验与血清中和试验(SN)和微量标准EIA作了相对灵敏性和特异性的比较。

关键词：酶免疫抗体猪血清

Rotating effects on the thermophysical properties of a two-dimensional GaAs quantum ring

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Communications in Theoretical Physics 2024年第6期76卷 165-173页

作者： ahmad Ghanbari Department of Physics College of ScienceYasouj UniversityYasoujIran

In this work,we have investigated the rotating effect on the thermodynamic properties of a 2D quantum ***,we have considered the radial potential of a 2D quantum ring and solved the Schrödinger equation in the presence of the Aharonov-Bohm effect and a uniform magnetic field for the considered *** to the solution of the equation,we calculated the eigenvalues and eigenfunctions of the considered *** the calculated energy spectrum,we obtained the partition function and thermodynamic properties of the system,such as the mean energy,specific heat,entropy and free *** results show that the rotating effect has a significant influence on the thermophysical properties of a 2D quantum *** also study other effects of the rotating term:(1)the effect of different values of rotating parameters,and(2)the effect of negative rotation on the thermodynamic properties of the *** results are discussed in detail.

关键词： Schrodinger equation quantum ring rotation effect thermophysical properties

用竞争和间接ELISA检测血清和全血中BTV抗体的比较

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中国动物检疫 1988年第3期 35-37页

作者： ahmad afshar ,林建辉塘沽动植物检疫所

本文叙述了应用抗蓝舌病病毒(BTV)群特异性单克隆抗体(MAb)作间接酶联免疫吸附试验(I—ELISA)和竞争酶联免疫吸附试验(C—ELISA)检测牛羊血清中的BTV抗体,并对从10型BTV感染的3头小牛及4只绵羊,连续采集的血清及干涸于滤纸上的全血洗脱... 详细信息

本文叙述了应用抗蓝舌病病毒(BTV)群特异性单克隆抗体(MAb)作间接酶联免疫吸附试验(I—ELISA)和竞争酶联免疫吸附试验(C—ELISA)检测牛羊血清中的BTV抗体,并对从10型BTV感染的3头小牛及4只绵羊,连续采集的血清及干涸于滤纸上的全血洗脱液中检测BTV抗体的结果进行了比较。

关键词： ELISA 全血抗体滴度 BTV 洗脱液血清

Finite element model updating for structural damage detection using transmissibility data

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Earthquake Engineering and Engineering Vibration 2024年第1期23卷 87-101页

作者： ahmad Izadi Akbar Esfandiari Department of Maritime Engineering Amirkabir University of TechnologyTehran 15875-4413Iran

This paper presents a new finite element model updating method for estimating structural parameters and detecting structural damage location and severity based on the structural responses(output-only data).The method uses the sensitivity relation of transmissibility data through a least-squares algorithm and appropriate normalization of the extracted *** proposed transmissibility-based sensitivity equation produces a more significant number of equations than the sensitivity equations based on the frequency response function(FRF),which can estimate the structural parameters with higher *** abilities of the proposed method are assessed by using numerical data of a two-story two-bay frame model and a plate structure *** evaluating different damage cases,the number,location,and stiffness reduction of the damaged elements and the severity of the simulated damage have been accurately *** reliability and stability of the presented method against measurement and modeling errors are examined using error-contaminated *** parameter estimation results prove the method’s capabilities as an accurate model updating algorithm.

关键词： damage detection model updating output-only transmissibility sensitivity equation

Correlation between structural phase transition and physical properties of Co^(2+)/Gd^(3+)co-substituted copper ferrite

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Journal of Rare Earths 2024年第7期42卷 1344-1353,I0006页

作者： Mohsen Choupani ahmad Gholizadeh School of Physics Damghan UniversityDamghan36716-45667Iran

The doping of the spinel ferrites with selective cations usually improves the properties of the parent *** effect of Co^(2+)/Gd^(3+)co-substitution on the microstructure,optical,and magnetic properties of Cu1-xCoxFe2-xGdxO4 prepared by the citrate-nitrate auto-combustion synthesis was *** of the samples was performed with powder X-ray diffraction(XRD),Raman and Fouriertransform infrared(FTIR)spectroscopy,field-emission scanning electron microscopy,X-ray energydispersive spectroscopy,UV-Vis spectroscopy,and a vibrating sample *** results of XRD,Raman,and FTIR analysis show a gradual structural phase transition from a tetragonal(I41/amd)structure to a cubic(Fd3m)*** bandgap energy of the studied samples is in a range of 1.57-1.75 eV with a minimum in sample x=0.06 and then *** investigations show that the presence of Co^(2+)/Gd^(3+)cations in an octahedral site of the copper ferrite structure could increase saturation magnetization and coercive field from 567.9 Oe and 23.62 emu/g to 929.4 Oe and 28.27 emu/g,respectively.

关键词： Spinel copper ferrite Citrate-nitrate method Structure phase transition Microstructure properties Magnetic properties Rare earths

Evaluation of soil loss severity and ecological restoration approach for sustainable agriculture in the Hindu Kush, Karakoram and Himalaya region

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Journal of Mountain Science 2024年第5期21卷 1509-1521页

作者： Arshad ASHRAF Imran ahmad Climate Energy and Water Research InstituteNational Agricultural Research Centre(NARC)Islamabad 44000Pakistan

Soil erosion has resulted in removal of the topsoils containing fine soil particles and plant nutrients, causing decrease in soil fertility in the Hindu Kush, Karakoram and Himalaya(HKH) region. The existing production of cereal crop grains has been reduced to one third of the potential crop grains production owing to land degradation and poor farming practices. It is necessary to assess risk of soil loss and identify appropriate controlling measures to address issues of low agriculture productivity and water insecurity in the region. In the present study, severity of soil loss was predicted using Revised Universal Loss Equation(RUSLE) and ecological measures were identified for sustainable mountain agriculture in the HKH region of Upper Indus Basin, Pakistan. Overall 62.6% area was found to have very low risk of soil loss, i.e., 100 t/(ha·yr) in about 6.8% and 7.4% areas respectively. The mean rate of soil loss was about 41.9 t/(ha·yr) in the Hindu Kush, 31.1 t/(ha·yr) in the Himalayas, 18.8 t/(ha·yr) in the Karakoram and overall 29.7 t/(ha·yr) in the three HKH ranges. As such no considerable measures have been adopted by the communities for restoration of the degraded areas except raising fruit/farm trees and supporting limited social forestry for their livelihoods. The slopes cleared for cultivation and susceptible to erosion may be stabilized through sowing/planting of multi-purpose plant species and formation of proper bench terraces. The conservation of forest ecosystem and pastures at higher elevations would help in reducing overland water flow, risk of flash flood hazard and minimizing sediment loads in the downstream. It is essential to adopt site-specific resource conservation techniques and restore possible ecosystem health for sustainable agriculture and economic developm

关键词： Climate change Erodibility Indus basin Land degradation Slope stabilization